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Finding the Fourth Proportional to 423.33, 635.30 and 261.13

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Solution

The fourth proportional to 423.33, 635.30 and 261.13 is: 391.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    423.33 : 635.30 = 261.13 : x
  2. Step 2: Convert to fraction form
    423.33/635.30 = 261.13/x
  3. Step 3: Cross multiply
    423.33x = 635.30 × 261.13
  4. Step 4: Simplify right side
    423.33x = 165,893.65
  5. Step 5: Solve for x
    x = 165,893.65/423.33
  6. Step 6: Final answer
    x = 391.88

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.